58.8 MB (4.1 MB compressed)
5550 x 3700 pixels
47.0 x 31.2 cm ⏐ 18.5 x 12.3 in (300dpi)
DR JUERG ALEAN / SCIENCE PHOTO LIBRARY DR JUERG ALEAN / SCIENCE PHOTO LIBRARY
Highly streamlined lenticular altocumulus clouds are seen over Greifensee, Switzerland with the Alps in the background. Such clouds form in standing waves in strong winds within the troposphere, They remain stationary despite the high velocity winds.
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